8 research outputs found
Geographic and Ecological Assessment of Coastal Zone on the Russian Black Sea Aquatory as a Region of Mariculture Development
No full textConcentration of hydrogen sulfide in waters of the Black Sea in the layer of its coexistence with oxygen
No full textAbout 100 parallel determinations of hydrogen sulfide by the volumetric and photometric methods were made in the layer of coexistence of oxygen with hydrogen sulfide (C layer). Thiosulfates were determined simultaneously. Regardless of locations of the stations, determinations by two methods coincided for the entire range of depths of occurrence of the C layer upper boundary. Within the C layer hydrogen sulfide readings obtained by these two independent methods agreed; thiosulfates were not found by direct measurements. Difference in the readings appears at the lower boundary of the C layer and below it, accompanied by appearance of thiosulfates. It is therefore concluded that it is correct to determine the upper boundary of the C layer by the iodometric method and to use concentration of hydrogen sulfide obtained by this method in the C layer to calculate rate of chemical oxidation of hydrogen sulfide in quasistationary processes
Seasonal Hydrogen Sulfide Zones of the Northwestern Black Sea Shelf: Nature, Dynamics, Prediction
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Inter-annual variability of the hydrological-chemical characteristics in the north-western Black Sea shelf area over recent decades (1960–1990)
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